mirror of
https://github.com/balena-os/balena-supervisor.git
synced 2024-12-19 21:57:54 +00:00
dd5f62227a
The memory information reported by the supervisor currently estimates the value of used memory as `MemTotal - MemFree`. However, linux systems will try to cache and buffer as much memory as possible, which will affect the output of `MemFree` (from /proc/meminfo) and in consequence the memory usage seen by the user on the dashboard, which will appear much greater than it is. The correct calculation should be `MemTotal - MemFree - Buffers - Cached`, which the calculation performed by `htop` and the `free` commands. Change-type: patch Signed-off-by: Felipe Lalanne <felipe@balena.io> Connects-to: #1471
106 lines
2.6 KiB
TypeScript
106 lines
2.6 KiB
TypeScript
import { expect } from 'chai';
|
|
import * as sysInfo from '../src/lib/system-info';
|
|
|
|
import { SinonStub, stub } from 'sinon';
|
|
import * as systeminformation from 'systeminformation';
|
|
|
|
function toMb(bytes: number) {
|
|
return Math.floor(bytes / 1024 / 1024);
|
|
}
|
|
|
|
function toBytes(kb: number) {
|
|
return kb * 1024;
|
|
}
|
|
|
|
describe('System information', () => {
|
|
describe('Delta-based filtering', () => {
|
|
it('should correctly filter cpu usage', () => {
|
|
expect(
|
|
sysInfo.filterNonSignificantChanges({ cpu_usage: 21 }, {
|
|
cpu_usage: 20,
|
|
} as sysInfo.SystemInfo),
|
|
).to.deep.equal(['cpu_usage']);
|
|
|
|
expect(
|
|
sysInfo.filterNonSignificantChanges({ cpu_usage: 10 }, {
|
|
cpu_usage: 20,
|
|
} as sysInfo.SystemInfo),
|
|
).to.deep.equal([]);
|
|
});
|
|
|
|
it('should correctly filter cpu temperature', () => {
|
|
expect(
|
|
sysInfo.filterNonSignificantChanges({ cpu_temp: 21 }, {
|
|
cpu_temp: 22,
|
|
} as sysInfo.SystemInfo),
|
|
).to.deep.equal(['cpu_temp']);
|
|
|
|
expect(
|
|
sysInfo.filterNonSignificantChanges({ cpu_temp: 10 }, {
|
|
cpu_temp: 20,
|
|
} as sysInfo.SystemInfo),
|
|
).to.deep.equal([]);
|
|
});
|
|
|
|
it('should correctly filter memory usage', () => {
|
|
expect(
|
|
sysInfo.filterNonSignificantChanges({ memory_usage: 21 }, {
|
|
memory_usage: 22,
|
|
} as sysInfo.SystemInfo),
|
|
).to.deep.equal(['memory_usage']);
|
|
|
|
expect(
|
|
sysInfo.filterNonSignificantChanges({ memory_usage: 10 }, {
|
|
memory_usage: 20,
|
|
} as sysInfo.SystemInfo),
|
|
).to.deep.equal([]);
|
|
});
|
|
|
|
it('should not filter if we didnt have a past value', () => {
|
|
expect(
|
|
sysInfo.filterNonSignificantChanges({}, {
|
|
memory_usage: 22,
|
|
cpu_usage: 10,
|
|
cpu_temp: 5,
|
|
} as sysInfo.SystemInfo),
|
|
).to.deep.equal([]);
|
|
});
|
|
});
|
|
|
|
describe('Memory information', function () {
|
|
it('should return the correct value for memory usage', async () => {
|
|
const [total, free, cached, buffers] = [
|
|
763472,
|
|
143896,
|
|
368360,
|
|
16724,
|
|
].map(toBytes);
|
|
|
|
// Stub the output of the systeminformation module
|
|
stub(systeminformation, 'mem').resolves({
|
|
total,
|
|
free,
|
|
used: total - free,
|
|
cached,
|
|
buffers,
|
|
slab: 0,
|
|
buffcache: 0,
|
|
available: 0,
|
|
active: 0,
|
|
swaptotal: 0,
|
|
swapfree: 0,
|
|
swapused: 0,
|
|
});
|
|
|
|
const meminfo = await sysInfo.getMemoryInformation();
|
|
expect(meminfo.total).to.be.equal(toMb(total));
|
|
|
|
// used memory = total - free - (cached + buffers)
|
|
// this is how `htop` and `free` calculate it
|
|
expect(meminfo.used).to.be.equal(toMb(total - free - (cached + buffers)));
|
|
|
|
(systeminformation.mem as SinonStub).restore();
|
|
});
|
|
});
|
|
});
|